Improvement in deeeioks



'Quinn tutes @anni @fitte JAMES s. LESTER AND LYMAN o. JENNINos'-, or LAFAYETTE, INDIANA.

Lena-S man No. 64,336, and April so, 1867.

IMPROVEMENT IN DERRICKS.

To ALL Wnon 1T MAY ooNoERN: j

Be it known that we, JAMES S. Lns'rnn and LrnAN G. Jmzafinos, of Lafayette, in the county of Tippecanoe,

and State of Indiana, have invented a ne and useful Improvement in Derrick; and we do hereby declare that the following isa full, clear, and exa-ct description thereof, trhich will enable others skilled in the art to make and use the saine, reference being had to the accompanying drawings, forming part of this specification', in which- Figure 1 is a side view of our improved derriok7 part of one brace being broken away to show the construct-ion.

Figure 2 is a top View of the same.

Similar letters of reference indicate like parts.

Our invention has for its object to furnish animproved derrick for raising briclgmortar, and other building materials to thc place where they are to be used; and it consists in the combination ofthe revolving or swinging adjustable frame, revolving pulley-box or frame, adjustable brace,.and upright shaft with each other, as hereinafter more fully described. Thev derriok is designed to be placed either inside or outside of the building being erected, as may be most convenient, but we generally prefer to place it outside, as in that case the materials can usually be more readily brought to it. Y Y

A is the vertical post or cylinder, the lower end of which may rest upon thesurface of the ground or in a hole dug for its reception. The cylinder A is'held in an erect position bythe adjustable braces B, the upper ends of which are pivoted in iron sockets, C, attached to the said cylinder, and their lower ends are secured to the ground by stakes or pins driven through holes in the said lower ends and into the ground. By this construetion the braces B may be adjusted so as to hold the cylinder A vertical, however uneven may be the surface of the ground upon which the derricli is placed. AD is a block, through which 'the upper part of the cylinder A passes, and which rests upon a shoulder formed upon the middle part of said cylinder or post by rounding o` its upper part, as shown in g. l. To the ends of the block. D are pivoted the lower ends of the adjustable supporting timbers E, as shown in iig. 1. The upper parts of the timbers E are slotted for the reception of the ends of the horizontal timber F. The upper end of the cylinder A passes through a hole in the centre of the said timber F, so that it may revolve or swing freely about the said cylinder. The timber F is supported by pins passing through holes in the ends of the said timber and through one or the other ofthe holes through the timbers E, according to the height to which the building materials are to be raised. G- is the box or frame in which the pulleys H l are place-i. This frame is attached to and revolves about the lower part of the cylinder A, :is shown in iig. l, so that the ropes -T K may be free to accommodate themselves to the position to which the upper part or" the lei-rick may be swung. The shaft L, to which the pulleys H and I are attached, revolves in bearings in the frame or box G. )l is a gear-wheel securely attached to the pulley-shaft L, and which, as it v is revolved, carries .with it the shaft Land pnl-lcys H I. N is a gear-wheel attached to the crank-shaft O, the teeth ofwhich mesh into the teeth of the gear-wheel M. lnis a crank attached to the end of the crank-shaft 0,'as shown'in fig. l'.A l *andl K are ropes, the ends of which are attached to the pulleys H and I in such a way that as rthe'one rope is Wound upon its pulley, raising the platform attached to its other ond, the other rope is unwound, lowering its platform. ylhe ropes J and K pass from the pulleys H and I up to the ends of the timber F, where they pass around the pulleys of the bores R,which are swivelled to the ends of the said timber. S are platforms attached to the ends of the ropes J and K, upon which the brick, morta-r, or other material is raised to the desired place. I

In using the machine, it is secured in a vertical 4position in the manner before described. The lower platform is then loaded ivith brick, mortar, or other material, and by operating the crank P the loaded platform is raised and the unloaded one lowered. Then, by drawing the rope of the unloaded platform in one direction the loaded plat-form is swung in the 'opposite direction, and may thus be guided to the place where the material is wanted.

What we claim as new, and desire to secure by Letters Patent, is- ,y

l. The combination of the revolving or swinging adjustable frame D E F 'with the vertical post or cylinder A, substantially as herein shown and described.

2. 'lhe combination of the revolving pulley-borA Gr with the v-crtical post or cylinder A, substantially as herein-shown and described.

3. Au imprevedrderriek, formed. by the-combination `of the pulley-box or frame G,- the'adjustable frame D E F, the vertical post or cylinder A, andthe adjustable braces B with euch other, substantially as herein shown and described.

4. Connecting the ropes J K and pulleys H with each other, with pulley-box or frame Gr, and with the swinging frame D E F in suoli away that one of the platforms attached to said ropes may be misenl'ut the same time and by the same operation by which the other one is lowered, substantially as herein shown `:uid described.

JAS. S. LESTER, LYMANv G. JENNINGS.

Witnesses:

A. J. MORLEY, E. S. LEMON. 

